Steam-actuated valve for engines and motors.



No. 694,709. Patented Mar. 4,1902.

W. A. WODDESDN. STEAM ACTUATED VALVE FDR ENGINES AND MOTORS..

A limin filed Sept. 21, 1901.

(No Model.) 7 3 Sheets8heet I.

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No. 694,709. Patented Mar. 4, I902.

w. A. woonas'onJ I STEAM AC'TUATED VALVE FUR memes Aun'morons.

[Application filed Sept. 21, 1901.

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w. A. woonesou. STEAM ACTUATED V A LV E FQR'EN GINES AND MOTORS.

(Application filed Sept. .21 1901.)

Patented Mar. 4, I902.

' (No Model.) 3 Sheets-Sheet a.

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UNITED STATES PATENT OFFICE.

WILLIAM ARMSTRONG WOODESON, or GATESHEAD, ENGLAND, ASSIGNOR TO CLARKE, CHAPMAN AND COMPANY, LIMITED, OF GATESl-IEAD, ENG- LAND.

STEAM-ACTUATED VALVE FOR'EN'GINES AND MOTORS.

SPECIFICATION forming part of Letters Patent No. 694,709, dated March 4, 1902.

Applicationfiled September 21, 1901. Serial No. 76,113- (No model.)

who??? it y 0071108770: upper end by a wall 5, that forms a trans- Be it known that I, WILLIAM ARMSTRONG verse partition and divides the liner 3 into WOODESON, a subject of the King of Great two chambers 6 and 7' in line with each other Britain and Ireland, residing at .Gatesheadfor the valves 1 and 2, respectively.

on-Tyne, in the county of Durham, England, The main valve 1 is of the piston type and have invented Improvements in Steam-Acis provided with three rings 58, 59, and 60, tuated Valves for Engines and Motors, of that fit the liner 3 and between which there which the following is a specification. are two portions of smaller diameter that This invention relates to improvements in form chambers 8 and 9. The auxiliary valve [O that kind of piston-valve distributing mech- 2 is also of the piston type and is provided anism for direct-acting steam-pumps, feedwith two rings 61 and 62, that fit the second pumps, compressors, rock-drills, or other enliner 4 and between which there is a portion gines actuated by steam or compressed air of of smaller diameter that forms a chamber 10.

' the kind described in the specification of LetlrVhen the piston 11 of the motor-cylinder is I5 ters Patent No. 655,537, granted to me, in in its highest position, as is shown in Figs. 1 which the valve that controls the admission and 2, the chamber 8 between the rings 58 and the exhaust of the actuating fluid to and and 59 forms a communication between ports from the motor-cylinderis moved so as sudl2 and 13 in the liner 3, of which the port 13 denly to put the respective ends of the eylis connected by a passage 14, a port 15, and

' 2o inder into communication with live steam the chamber 10 with the steam-inlet 16 of the and exhaust as required, its operation being valve-chest, and the.port 12 is connected by effected by the actuating fluid (hereinafter a passage 17 with the upper end of the cylincalled steam itself under the action of an der 18, while thechamber 9 between rings 59 auxiliary valve operated by a moving part, and '60 forms a communication between ports 25 such as the cross-headof the piston-rod. 19 and-2O in the liner 3, of which the port 19 is Now thisinvention has for its object toimconnected by a passage 21, aport' 22, the prove the construction and working of such chamber 7, a port 23, and a passage 24, with piston-valvedistributing mechanism, as herethe exhaust-outlet 25, and the port 20 is coninafter more fully described, and pointed out nected by a passage 26 with the lower end of 0 in the claims. the cylinder 18. When the piston 11 of the The accompanying illustrative drawings motor is in its lowest position, the valve 1 is show, as an example, part of the motorof a diin such a position that the upper end of the root-acting steam-pump provided with steamcylinder 18 is in full communication with the distributing apparatus according to this inexhaust-outlet 25 through the passage 17, the 35 vention. port 12, the chamber 8, a port 27, a'passage Figures 1 and 2 show part of the motor-cyl- 28, a port 29, the chamber 7, a port 30, and inder and the valve-chest as seen from the opthe passage 24, while the lower end of the posite sides of a vertical central sectional cylinder 18 is in full communication with the plane. Figs. 3 and 4 show the same in secsteam-inlet 16 through the passage 26, the 40 tion on the lines A A and B B, respectively, port 20, the chamber 9, a port 31, a passage of Figs. 1 and 2. Fig. 5 shows a development 32, a port 33, and the chamber 10. of the periphery of the liner, the plane of di- When the main valve 1 is in the position vision being indicated by the line C O of Fig. showninFigs. 1 and 2, the chamber 10 of the 3; and Fig. 6 shows the liner in vertical cen auxiliary valve 2 is in communication with 5 tral section and with'the valves in theposithe upper end of the chamber 6 through a 5 tion shown in Figs. 1 and 2. port 34:, a passage 35, and a port 36. Steam The main valve 1 and the auxiliary valve is thus admitted to the chamber 6 and the 2 are accommodated in a liner 3, which is of main valve 1 kept in the position shown, suitable material, such as cast-iron, and is steam from the lower'end of the chamber 6 50 provided with a second liner 4, closed at its having during the downward movement of the IQ) thelower end of the chamber 6 from the chamher 10 of the valve 2 through aport 40, a passage 41, and a port 42, steam from the upper end of the chamber 6 having been expelled through a port 43, a passage 44, a port 45, the chamber 7, the port 30, and the passage 24 to the exhaust-outlet 25.

As will be seen, the positions of the ports 37 and 43 in the chamber 6 are such as to cause the main valve 1 to be cushioned at the ends of its strokes. In order to balance the main valve 1, passages forming almost complete rings are made in the wall of the liner3 as continuations of the ports 36, 43, 50, 27, 12, 13, 31, 20, 19, 51, 37, and 42, respectively, so as to surround the rings of the valve 1 when these rings are opposite to the corresponding ports.

The ports 33 and 15 are placed in the liner 4 in such a position that when the piston 11 has traveled, say, three-quarters of its upstroke the auxiliary valve 2 closes the port and so cuts olf the passage of steam to the lower end of the cylinder 18 and causes the upstroke of the piston 11 to be completed by the expansion of the steam that has already been admitted to the cylinder. On the return stroke of the piston 11, say at threequarters of the way down, the auxiliary valve 2 closes the port 15, and thus cuts elf the passage of steam to the upper end of the cylinder 18 to cause the steam that has been already admitted to complete the stroke of the piston 11 expansively.

The piston 11 is shown at the end of its normal upstroke with the auxiliary valve 2 in such a position as to close the exhaustport 30. Should the valve 1 then not be moved down with suflicient speed or should the piston 11 travel farther from any cause, the auxiliary valve 2 would be moved also and would for the purpose of preventing the piston 11 from striking the cover of the cylinder 18 admit live steam to the exhaust side of the piston 11 from the chamber 10 through a port 46, a passage 47, the port 29, the passage 28, the port 27, the chamber 8, the port 12, and the passage 17. When the piston 11 is at the end of its normal downstroke, the auxiliary valve 2 is then in such a position as to close the exhaust-port 23. Should the main valve then not be moved up with sufficient speed or should the piston 11 travel any farther after closing the port 23, the auxiliary valve 2 would be moved so as to form a steamcushion at the lower end of the cylinder by admitting live steam to the exhaust side of the piston 11 from the chamber 10 through a port 48, a passage 49, the port 22, the passage 21, the port 19, the chamber 9, the port 20, and the passage 26.

50 and 51 are auxiliary steam-ports which supply steam to the top and the bottom of the main valve 1, respectively, after the ports 34 and 40 have been closed by the auxiliary valve 2, the ports 50 and 51 being connected with the chamber 10 by passages 52 and 53 and ports 54 and 55, respectively.

The steam-passages Hand 32 are externally connected to the steam-supply pipe by pipes 56 and 57,-provided with suitable valves, so that if the piston 11 stop during that portion of the stroke through whichit is propelled by expansion of the steam steam from the steam-supply pipe can be admitted to either end of the cylinder 18 by opening the valveon the pipe 56 or 57, so as to cause the piston to be moved to the end of the stroke, and thereby start the pump. The valve fitted to the pipe 56 or 57 is then closed and the pump worked in the manner hereinbefore described.

The movement of the auxiliary valve 2 is effected by the cross-head of the pump-rod in a manner well understood. As will be obvious,the valve-chest liner 3 may be divided into two chambers by means of a partition made in one with the liner, as described in the before-mentioned patent, in lieu of having a second liner 4.

It will be seen that in the apparatus described and shown there is only a single passage connecting each end of the cylinder with the valve-chest instead of two passages, as in the apparatus described in the aforesaid specification.

What I claim is- 1. Means for distributing and controlling the steam in a motor, comprising a main valve and an auxiliary valve placed in line with each other, said auxiliary valve being so arranged as to cut off the steam-supply at a fixed point of the stroke of the motor-piston as set forth.

2. Means for distributing and controlling the steam in a motor, comprising a main valve and an auxiliary valve,valve-chambers therefor, and a main steam-inlet and a main steamoutlet, said auxiliary Valve controlling said inlet and outlet, as set forth.

3. Means for distributing and controlling the steam in a motor, comprising a main valve and an auxiliary valve placed in line with each other and workingin a liner divided into two valve-chambers, passages connecting the steam-inlet and exhaust-outlet with the auxiliary-valve chamber and the auxiliary-valve chamber with the main-valve chamber, said auxiliary valve directly controlling said inlet and outlet, as set forth.

4. Means for controlling and distributing the steam in motors comprising two valvechambers in line with each other and contained within the same liner, a main distributing-valve in one of said chambers, an auxiliary valve in the other of said chambers, adapted to operate said main distributingvalve by controlling the passage of steam inlet and outlet, as set forth.

5. Means for controlling and distributing the steam in motors comprising two valvechambers-in line with each other and contained within the'same liner, a main distributing-valve in one of said chambers, an auxiliary valve in the other of said chambers, adapted to operate said main distributingvalve by controlling the passage of steam thereto and to directly control the main steam inlet and outlet, and means for moving said auxiliary valve, as set forth.

6. Means for controlling and distributing steam in motors comprising two valve-chambers in line With each other, a main distributing-valve in one of said chambers, an auX-' iliary valve in the other of said chambers, a steam-supply pipe, and means whereby steam can be admitted to either end of the cylinder direct from the steam-supply pipe, as set forth.

7. Means for controlling and distributing steam in motors comprising two valve-chambers in line with each other, a main distributing-valve in one of said chambers, an aux-- iliary valve in the other of said chambers, a steam-supplypipe, and means whereby steam can be admitted to the exhaust side of the motor-piston after the exhaust-outlet has been closed, as set forth.

8. Means for controlling and distributing the steam in motors comprising two valvechambers in line with each other and contained within the same liner, a main distrib uting-valve in one of said chambers, an auxiliary valve in the other of said chambers, a port within said auxiliaryvalve chamber adapted to be uncovered by said valve should the main piston exceed its normal stroke and admit live steam to the exhaust side of the piston, as set forth. i

9. Means for distributing and controllin the steam in a motor, comprising a main valve and an auxiliary val ve,valve-chambers therefor, passages connecting said valve-chambers together, and connections between some of said passages and the main steam-supply, adapted to allow steam to pass directly to either end of the motor-cylinder, as set forth.

10. Means for controlling the passage of steam to and from a motor-cylinder, comprisin ga main-valve chamber, a main valve therein, an auxiliary-valve chamber, an inlet for steam thereto, an exhaust-outlet therefrom, passages connecting the ends of the motorcylinder with the auxiliary-valve chamber, an auxiliary valve in said chamber, and means for moving said auxiliary valve, so as to, put the ends ofv the said cylinder alternately in communication with the main steam inlet and outlet as set forth.

11. Means for controlling the passage of actuating fluid to and from a motorr cylinder comprising two valve-chambers, a main piston-valve, having two annular chambers, in one of said valve-chambers, an auxiliary pis ton-valve having a single annular chamber in the other of said valve-chambers, an inlet for steam, an exhaust-outlet, a permanent communication between said steam-inlet and the annular chamber of the auxiliary valve, passages adapted to form a communication between the annular chamber of said auxiliary valve, the auxiliary-valve chamber and the ends of the motor-cylinder, and means for moving said auxiliary valve so as to put the ends of said cylinder alternately in communication with the main steam inletand exhaust, as set forth.

Signed at Gateshead, in-the county of Dur= ham, England, this 4th day of September, 1901.

WILLIAM ARMSTRONG woonn'sor. 

